Quantitative Aptitude Mock Test 31

A and B can do a work in 12 days and 15 days respectively. If they work together for 3 days, what part of the work is done?

Three men A, B, and C can do a work in 10, 12, and 15 days respectively. If A works for 3 days, B works for 4 days, and C works for 5 days, what part of the work is done?

A and B can complete a work in 10 days and 15 days respectively. If they work together for x days and then A leaves, B will take 2 days to complete the remaining work. Find x.

A cistern can be filled by pipe A in 6 hours and by pipe B in 8 hours. If both the pipes are opened together, how long will it take to fill the cistern?

A cistern can be emptied by pipe C in 10 hours. If pipe A and C are opened together, how long will it take to fill the cistern if pipe A can fill the cistern in 6 hours?

A cistern has two inlets, A and B, and one outlet, C. A can fill the cistern in 6 hours, B can fill the cistern in 8 hours, and C can empty the cistern in 12 hours. If all the three pipes are opened together, how long will it take to fill the cistern?

A pipe can fill a cistern in 6 hours. If the cistern is already 2/3 full, how long will it take the pipe to fill the remaining part of the cistern?